Newark (EWR) to Houston (IAH): On-Time Performance
Data through July 2026
The calendar drives reliability on EWR–IAH. September 2025 flights landed on schedule 88% of the time, but July 2024 dropped to 52% — a gap of 36 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 69%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 2.0%
- Flights/day
- 10
- last 12 months
- Duration
- 3h 59m
- scheduled
- Distance
- 1,400 mi
Best airline from EWR to IAH
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 78% | 18 min | 1.7% | 7,251 |
| Spirit Airlines | 73% | 25 min | 5.4% | 606 |
Monthly on-time trend
Best time to fly from EWR to IAH
Aim for departures around 5 a.m. (92% on-time); avoid 6 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 17 min |
| Tuesdaybest | 81% | 15 min |
| Wednesday | 79% | 16 min |
| Thursday | 76% | 20 min |
| Friday | 76% | 19 min |
| Saturday | 76% | 20 min |
| Sunday | 77% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations28%
- National airspace system29%
- Weather5%
Frequently asked questions
- How often are flights from EWR to IAH delayed?
- 23% of EWR–IAH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 18 minutes.
- Which airline is most reliable from EWR to IAH?
- United Airlines has the best on-time record on this route at 78%, based on 7,251 flights. 2 airlines flew EWR–IAH frequently enough to compare in this period.
- What is the best time of day to fly from EWR to IAH?
- Departures around 5 a.m. have the best record (92% on-time), while departures around 6 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from EWR to IAH?
- The scheduled EWR–IAH flight time averages 3h 59m over 1,400 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are EWR to IAH flights cancelled?
- 2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from EWR to IAH?
- July 2024 was the roughest month in this dataset, with only 52% of arrivals on time. The best was September 2025 at 88%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 7,857 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.